Valve.



c. J. mmzmimrnn. VALVE.

Patented 1101104908.

Dinar-no nun Ape. 10, ms;

1 11111. 7 I 222222222 :53 E5. 7 0 n WITNESSES a lar amusements, PEfiK'SYLYflIA.

BENZENHAFER,

VALVE Specification of Letters Patent. I Application filed August/10, 1995. Serial no 273,595"

Patented mm. 10, mos.

' C To, all whom it may concern."

Be it known that I, CHARLES .J. Bnivzrx l-IAl-Elt, a citizen of the United States, residing at lhihulelphia, county of Philadelphia, and State oi Pennsylvania, have invented a certain new and useful Improvement in Valves, of which the following is a. specific-ation.

My invention .relatcs to a newand useful improvement in valves, and has for itsobject to provide'a construction invalves, particu y globe valves, in which the packing of the valve-stem is entirely done away with and providesagainstthe escape of steam around the valve-stem, whether the valve is even or closed.

\Vith these ends in view, this invention consists in the details of construction and.

combination .of elements hereinaft r set forth and then specifically designated by the claim.

In order that thoseskilled in the art to which this inventionapnertains may under- 'stand how to make and use the same, the construction and operation will now be described in detail, reference being had to the accompanying drawing forming a part of this specification, in which- Figure 1 is'a loi'igitudinal sectional view through my improved valve showing the same closed; Fig. 2, a cross-section taken'on the line 2- 2 of Fig. 1.

- A represents. the bodv of the usual form of globe- 'valv e, B is abonnet through which thevalve-steinextends, C- is the valve-disk which-is ada )ted to contart with-its lower side'the seatto shut, otl' the steam hetwt-en the two ports, and the upper side of tile,- .va1ve-dis k C is adapted to come in coi-itac't; with the seat E formed upon the lower end of the bonnet so as to prevent t" escape of .steam upward around the val\'e-:'-:te1u when the valve is fully opened; I is a slide adilpted to slide in the bonnet l and has secured to its lower end the valve-disk G1 is the valve-stem, the lower end of whicli is threaded into the slide F. ll is a hemispherical shoulder which ground to tit tightlyagainst the underside ot' the cap ll which is threaded into the bonnet. -I is a plate secured between the bonnet and rap, through which the valve-stein (-l passes, and J is a spring interposed between this plate'or tendsto hold the shoulder against its seat. Thus it will be seen that when th valve-stein. is rotated in.

' one direction'the valve-disk-Clwill be raised,

and on a continued turning of'the valve-stem the valve-disk Wl'll be'forced a alnst the seat Ekv'ltll a spring'pressurc'and t ns efl'ectually prevent any steam upward around the-valvestem vor gate, and while the valve i'sbeing closed the spring J \Ylll'fOlCQ' the shoulder I ll tightly against its sea-tand prevent any-escape of the steam at this time.

Itwill thus be seen that Ihave provided a valvev in which no packing is used, upon the valve-stem, butat the same time will effectually prevent t-he'esl'rape of steam around ,he valve-stem, and this valve will be exceedingly durable and economical, as itdoes away with the entire expense of packing,-

and does not need to be looked after like a packed 'valve,; th sl de F, ofcourse, must- -be provided with means to prevent the same turningwithin the bonnet B.

' The bonnet B at its loweredge is formed with an annular depending flange of contracted width as compared with said bonnet- (lisposec'l mid-way of its inner and outer circumference which constitutes the seat E. lixteriorly the bonnet is threaded and atthe upper ends of its threads formed with an outstanding flange E, the said threads and flange 1i, engaging body A. Atits upper end bonnet B is counterbored and interiorly threaded as at 'A, the counterboring forming shoulder A onwhieh plate I seats.

B, at its lower portion is reduced in diameter and exterior-1v threaded tocnga'ge.

in said interior threads A", of the onnet, the end of cap B, seat-in" directly on the upper face of plate I. up B, has outstanding flange C, which seats on the top edge of bonnet 13'. -I have shown in the drawing the slide F made square iii crosssection, as shown in Fig. 2, but itis obvious that any means could be employed for preventing the rotation of the slide, as 'for instance the same could bei'nadecylindrical in shape with a feather orkey'wav to pre vent the same rotating. .It is also to be noticed that the (Jr) B, is of such form as to allow' a snflicient movement of the same therein as to fOlT'G the slide- F, upon the seat D, should it be necessary to etl'ect a sudden or quick elnsure'of the valve. Of course it is not the intention'o'l the invention that this should he the preferred manner of operating the valve, but it has been found advaniairrons when a quick or momentary closure is desired;

ins

Of course I do not wish to be limited to v the exact construction here shown, as slight .portion and modifications cr ull. be, made without departing from the spirit of the invention.

Having thus fully described my invention, what I claim as new, and-useful, is

' A valve consisting of a body having a threaded portion, a bonnet having a threaded lower en engaging said body threaded an outstanding flange at the topof said threads engagingsaid body, said bonnet at its lower end being formed with a depending annular flange of contracted Width as compared with said bonnet which flange constitutes a. valve seat and is. disposed midway. of the inner and outer circumference of said bonnet, the outer end of said bonnet being counterbored and threaded and forming a shoulder at-the base of said counterbored portion, a plate seating on said shoulder, a cap having its lower end reduced and threaded lnto said outer end of the bonnet to bear at its lower edge on said plate, an outstanding flange on said cap seating on the outer end'otf said body, a valve stem in said cap and body having a shoulder thereon, a coil spring abutting said shoulder and seatin on said plate, aslide in the bonnet connecte to said valve stem, and a valve disk on-said slide.

In testimony whereof, I have hereunto afiixed my signature in the presence of two subscribing Witnesses.

CHARLES J. BENZENHAFER. Htnesses MARY E. HAMER,

S. S. WILLIAMSON. 

